Bilateral middle ear cholesterol granuloma in familial hypercholesterolemia

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• 作者：Mansor Masaany ; Hashim Sabzah Siti ; Idris Nurliza ; Ami Mazita
• 关键词：A. Magnetic materials ; A. Nanostructures ; B. Sol– ; gel chemistry ; D. Magnetic properties
• 刊名：Otolaryngology - Head and Neck Surgery
• 出版年：2008
• 出版时间：June 2008
• 年：2008
• 卷：138
• 期：6
• 页码：803-804
• 全文大小：332 K

文摘

The barium hexaferrite nanorods were successfully prepared by sol–gel technique combined with polymethylmethacrylate as template. The crystal structure, morphology and magnetic properties of BaFe₁₂O₁₉ with different shape were investigated with X-ray diffraction, field emission scanning electron microscope and vibrating sample magnetometry. The results show that diameters and lengths of magnetic nanorods are about 60 nm and 300 nm, respectively. The coercivity of rod-shaped BaFe₁₂O₁₉ is increased to 5350 Oe, in comparison with 4800 Oe with plate-shape. The formation mechanism of BaFe₁₂O₁₉ nanorods and reasons resulting in high coercivity are discussed.